When creating SOLIDWORKS drawings you may find you want to use a parametric value, such as a dimension or an instance count, in a note field. The advantage to using a parametric value in a note is if that values changes in your part it will be automatically updated in the note itself. The process is very simple. Start a new note on your drawing, then while the cursor is blinking in the note field click on the item you want to link to. The following annotations can be used and I have included a photo example.
Dimensions, Instance counts, Hole callouts, Surface finish, Geometric tolerance, Datum feature, Balloon number
Jordan Nardick, CSWE